Display screen or portion thereof with icon



FIG. 1 is a front view of a display screen or portion thereof with icon, showing my new design; and,

FIG. 2 is a front view of a display screen or portion thereof with icon, showing an alternative embodiment of the new design.

The dot-dash broken lines illustrating portions of the display screen form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with icon, as shown and described. 